You could begin by experimenting with code like:
Code:
tell application "OmniFocus"
repeat with oLeaf in leaves of content of window 1
set oTask to value of oLeaf
try
set flagged of oTask to true
end try
end repeat
end tell
and
Code:
tell application "OmniFocus"
-- select leaves of content of window 1
pbcopy leaves of content of window 1
end tell